His parents, who were Christians, placed him under the care of the great St. Polycarp, Bishop of Smyrna. It was in so holy a school that he learned that sacred science which rendered him afterward a great ornament of the Church and the terror of her enemies. St. Polycarp cultivated his rising genius, and formed his mind to piety by precepts and example; and the zealous scholar was careful to reap all the advantages which were offered him by the happiness of such a master. Such was his veneration for his tutor's sanctity that he observed every action and whatever be saw in that holy man, the better to copy his example and learn his spirit. He listened to his instructions with an insatiable ardor, and so deeply did he engrave them on his heart that the impressions remained most lively even to his old age. In order to confute the heresies of his age, this father made himself acquainted with the most absurd conceits of their philosophers, by which means he was qualified to trace up every error to its sources and set it in its full light. St. Polycarp sent St. Irenaeus into Gaul, in company with some priest; he was himself ordained priest of the Church of Lyons by St. Pothinus. St. Pothinus having glorified God by his happy death, in the year 177, our Saint was chosen the second Bishop of Lyons. By his preaching, he in a short time converted almost that whole country to the Faith. He wrote several works against heresy, and at last, with many others, suffered martyrdom about the year 202, under the Emperor Severus, at Lyons.
Feast Day of Saint Irenaeus
The Feast Day of Saint Irenaeus is June 28. The origin of Feast Days: most saints have specially designated feast days and are associated with a specific day of the year and these are referred to as the saint's feast day. The feast days first arose from the very early Christian custom of the annual commemoration of martyrs on the dates of their deaths at the same time celebrating their birth into heaven.